> For the complete documentation index, see [llms.txt](https://docs.unbrowse.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.unbrowse.ai/sdk-reference/build-on-unbrowse.md).

# Build on Unbrowse

Install the current package:

```bash
npm install unbrowse@11.1.1
```

Choose the smallest useful surface:

* `createHole().fill()` for one intent-to-result call
* `Unbrowse.resolve()` plus `execute()` when your agent should inspect candidates
* `Unbrowse.proxy.fetch()` for controlled server-side egress
* `Unbrowse.account` and `Unbrowse.keys` for account operations

Applications authenticate with an API key. Metered work uses the account credit balance and throws `UnbrowseInsufficientCreditsError` when the balance is too low. State-changing executes receive idempotency keys automatically.

Keep site credentials in the local Unbrowse runtime. Do not send cookies or site bearer values through your own application server unless that is already part of your security model.